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MARKETABLE EQUITY SECURITIES (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Marketable Securities          
Increase (decrease) in fair value of equity securities $ (2.2) $ 2.0 $ (1.6) $ 3.9  
Investment value $ 0.2   $ 0.2   $ 1.7
TriStar          
Marketable Securities          
Stock that can be purchased by warrants (in shares) 19,640,000   19,640,000